Any chance the channels which still don't work are on transponders with a bit rate higher than 53 Mb/s? I'm using channels available from the UK at 28.2°E, so I haven't really been able to test it with any transponder carrying more data than that, unless you count the 8k test channel, which doesn't work. I might have another go with the upstream drivers at some point, and see if they are working any better.
some of high bitrate channels are ok (higher then 53 Mb/s) after changing ts_clk and target_mclk
but still some of transponders are not showning or green/broken video